DxD Mash-Up: Soul System

Ichijou Ryu, eldest son of the Shuei Clan Yakuza and older brother of Ichijou Raku, finds himself with memories of a past life and within those memories, he is able to understand that he reincarnated into DxD with a Soul System which gives him a unique way to power up in the danger-filled world. Finding himself in a mash-up of immense proportion, he will need to get it together as the balance of each power keeps tipping. What challenges await him? How strong are the threats? Will he be able to cope with the sheer inconvenience of spontaneously transporting/reincarnating/transmigrating into different worlds to answer a soul call? How strong will he become? How long will the chapters be for that world before going back to his main?
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The MC may be a reincarnated soul, but because I wanted him to fully integrate himself into that world, he retains the personality he cultivated in the world. Of course, he will be childish and make stupid mistakes because of this, though hints of maturity will still shine through. I'm not some 4D chess kinda dude, so the antagonists and all those cunning people in said animes will maybe fall short so I'll try my best.
He will obviously have bullshit luck and stuff.
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Alright, so critique is welcome and definitely comment whenever clarification is needed or you want to suggest something. Because as much as I want to be this amazing author- like quite a bit of people are on here- I am definitely not, so all the help for making this passion of mine a reality is welcome.
This will be one of many fanfics but it's already a massive undertaking, so I'll do my best to upload (don't count on it to be every day because work is killing me rn). With that being said, Patreon is tempting, but with how I might be inconsistent, it'll probably be best saved for later. Since I might just draw my own stuff, nsfw ofc but also sfw.
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This is Fanfiction I do not claim ownership or credit of any of the works here or their characters, only My OCs, so go support them.
Right, some of the character descriptions will be from Wiki and Fandom, this includes explanations about items/abilities/people/etc.